I keep a set of 4 to protect my rims when I'm off-road as a $30 piece is much easier to replace/repaint when needed than rims that are cost a few hundred bucks :) The installation info sheet says not to use more than 6 ft-lb of torque, which is where I installed my torque wrench as directed. However, on the first rim, when I got to the last bolt, the head of the bolt came loose before I even screwed it all the way into the rim! Now I'm missing a screw head and the threaded part is still in the rim so it looks a bit off. I can fix that, but these bolts actually seem to be made out of cheap materials, so I actually lowered the torque setting to just over 5 ft lbs to avoid damaging the others should they break. And for some reason they use a different style of bolt heads than the ones in the rims. Very strange. I can go to a home depot or Lowes and look for better screws. The good news is that on the first jeep ride I came back with a nice big cut on the rim profile and not the rim! So it definitely paid off right away and has already saved me hundreds of dollars. These are good and heavy treads so they should hold up well over time, and also with rocks and other objects that want to attack the rim off-road and even those curbs that sometimes like to hit the rim on the road; )